The screenshots that the Xilisoft software is generating from these individual firestorm DVDs are a bit strange.
The DVD picture, when played back is nice and smooth and is noticeably better than the 3x DVD boxset for certain.

But the screenshots generated have a slightly jagged and pixelated quality to them.
It's as though Xilisoft has got confused about the DVD picture dimensions and had to do some resizing.
I say that because it looks like the sort of thing you get when you do a resize in Photoshop and just use nearest-neighbour resampling.

I've never seen the software do that before.
I asked Xilisoft about it and they seem quite keen on fixing it.

Screenshots from vols 3, 7 and 9 are uploaded, as well as scans of the covers and linings.
I see that volume 4 is available thru amazon Japan.
I'm going to give it a few weeks and see if I get get vol 4 the same way that I got the others.